(1) Term of Interest

(2) Place Answer from Column 3 Below

(3) Choose from below the best explanation for the termlisted in Column 1 and place the corresponding “Letter” answer inColumn 2

1. Sunlight

1. An additional effect that follows as the result of some changein a system

2. Carboniferous Period

2. Average conditions that prevail in Earth’s atmosphere(temperature, humidity, cloudiness, and so forth) and the resultingconditions on Earth’s surface

3. Climate

3. The layer of the atmosphere that comprises about 80% of itstotal mass and where most weather phenomena occur.

4. Weathering

4. The dominant energy flow to Earth

5. Troposphere

5. The rate of energy production or consumption, often measured inunits of Watts

6. Stratosphere

6. A process whereby rain carries carbonic acid (formed in theatmosphere when carbon dioxide dissolves in atmospheric waterdroplets) to Earth’s surface where the acid reacts with exposedrocks.

7. Coal, oil, and natural gas

7. The portion of the atmosphere where the “ozone layer” isfound

8. Power

8. The process whereby chlorophyll-containing organisms use solarenergy to make carbohydrates from carbon dioxide and water.

9. Fuels

1. Average rate of energy-consumption of persons living in theUnited States in the 21^st Century

10. Feedback effect

10. A period some 360 million to 300 million years ago whenprolific growth of forests led to the burial of carbon thateventually became coal

11. Photosynthesis

11. The energy input to a system such as a power plant, and thatincludes any energy that ends up as waste heat

12. Energy Flows

12. The SI unit of power equal to 1 Joule per second (J/s)

13. 10,000 Watts

13. The common fossil fuels

14. Watt

14. Energy sources, in the form of substances whose molecular ornuclear configurations store energy

15. Primary energy

• Streams of energy that arrive at or near Earth’s surface at amore or less steady rate, bringing energy whether it’s needed ornot